Pressure gauge



S- 'J. ZASADA.

PRESSURE GAUGE. APPLICATION FILED SEPT- 29, 191.). I 1,436,224. 7 Patented Nov. 21, 1922.

2 SHEETS-SHEET I- s. 1; ZASADA. PRESSURE @AUGL, APPLICATION FILED SEPT. 29, I919.

' Patented NOV- 21, 1922.

2 SHEETS-SHEET 2.

V! m Pia .urllllllawwfllfllllllfl.

Patented N ov. 21, 1922.

STANLEY J. ZASADA, OF ERIE, PENNSYLVANIA.

PRESSURE GAUGE.

Application filed September 29, 1919. 7 Serial No. 327,034.

To all whomz't may concern:

Be it known that I, STANLEY J. ZASADA, a citizen of the United States, and resident of Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Pressure Gauges, of which the following is a specification.

This invention has for its main object to provide a pressure gauge for boilers by which an automatic regulation of the steam pressure therein is attained.

Another object is to provide an automatic regulation of the steam pressure effected upon the fuel supply thereof.

The above and other objects will become apparent in the description below, in which like characters of reference refer to likenamed parts in the drawings.

Referring briefly to the drawings, Fig. l is a view in perspective of the device.

Fig. 2 is a view of the pressure regulator, partly in elevation and partly in section.

Fig. 3 is a view of the oil valve illustrative of its operation.

Fig. 4 is another view of the oil valve.

Referring now in detail to the drawings, 1 is the casing of the device, supported on feet 2. The top is indicated by 3 and handles 4 are provided on the sides of the boiler to make the device readily portable.

A shuttered opening in the front panel of the boiler is indicated at 5, and 6 indicates a pair ,of doors communicating with the ash chamber, the doors being locked by a hook 7, in a common manner.

A tank 8, for the storage of the fuel oil or gasoline, is mounted in any desirable manner and communicates with the boiler thru a pipe 11 at the bottom, a shut-off valve 10 being interposed in the pipe. A level gauge 9 is provided on said tank for observing the. height of the column of fuel therein. If gas vapor is used as a fuel, the pipe 11 leads to the source of gas supply.

Another pipe 12 leads from a water supply to the boiler and a level gauge 18 is mounted on the boiler for observing the level of the water therein. A steam gauge and regulator 16 is also mounted on the side of the boiler, a pipe 17 communicating with the steam compartment thereof, and a cook 19 is provided to let condensed steam run off. A rack 20 depends from the gauge and engages a toothed wheel 21, which will. be later described.

A chimney 15 is provided in the top of the boiler to let off vapors and a safety valve 14 communicates with the steam compartment. A steam pipe 13 leads from the steam compartent, and has a valve 37 interposed.

The steam pressure gauge and regulator, indicated by 16 in Fig. 1, is shown in detail in Figs. 2, 3, and 4. Cylinder 74 is provided with holes at the top and bottom thru which the rod 48 passes, a stuffing box being provided about the lower opening. The rod 48 has a disk 53 to act as a piston, dividing the compartment 74 into an upper or air cylinder 49 and a, lower or steam compartment 50. A port 75 is drilled into the top of said upper compartment. A spring 51 is coiled about the rod 48 and its ends abut the lower side of the disk 53 and the bottom of the cylinder 74, respectively. An inlet 17 is provided, the same being the pipe communicating with the boiler. An indicating arrow 47 is mounted on the upper end of the projection of the rod 48, the same pro ecting into a surrounding cylindrical glass casing having a top cap 45 and graduations 46 thereon. Said graduations may be in any convenient unit, as pounds per square inch, or any arbitrary unit. A port 76 is provided in the side wall of said glass cylinder.

A rack 20 is provided at the lower part of the rod 48, and it engages a toothed wheel 21, the teeth being indicated by 59. A stem 60 act as the axle of the wheel, and projects into and thru the pipe 11, as illustrated. The channel thru said pipe is inclicated by 62, and a channel or hole of equal diameter thereto is provided thru the stem 60, indicated by 64. Fig. 3 shows, therefore, the valve wide open, and Fig. 4 shows the same closed.

The operation of my complete device is now apparent. Water is first passed into the boiler, the influx being stopped when the level has reached the position shown by action of the usual floating ball.

The oil valve 10 is then opened, allowing oil to flow out of the tank 8 thru the pipe 11 into the burner, where it is ignited. At the time the valve 60 is wide open, as the steam pressure in the chamber 50 is zero and the tension spring 51 retains the indicator 47 near the bottom or the gauge 46. During the burning of the oil, the burnt gases pass out thru the chimney 15. As the pressure in the steam chamber rises, the piston 53 is proportionately raised, causing the rack 20 to rotate the wheel 21 and thus partially shut off the valve 64, causing a reduction of the flow of oil into the burner.

It is thus obvious that I have devised an automatically regulated boiler to maintain a constant steam pressure, the steam whereof may be used for any of the many purposes to which steam is customarily put.

Having thus described my invention, what I claim and desire to secure by Letters Patent is as follows:

A pressure gauge comprising a cylinder having a piston slidably mounted therein, a

rod rigid with said piston and extending axially from both sides thereof, the cylinder having a passage through one end, said rod passing slidably through said passage, a pointer rigid with the end of said rod, a hollow, transparent cylindrical extension on the end of said cylinder, graduations arranged progressively upon said extension, said extension having a port near its outer end and an opening communicating with said cylinder, a coiled spring surroundin said rod between the lower end of saic cylinder and said piston and an inlet and outlet to said cylinder, both below said piston.

Signed at Erie, in the county of Erie and State of Penn. this 22 day of September A. D. 1919.

STANLEY J. ZASADA. 

